Ornamentation of exposed winding-wheels of watch-movements.



NOL 754,600. PATENTED MAR. 15, 1904.

. O. OHLSON. ORNAMENTATION OF EXPOSED WINDING WHEELS 0F WATCH MOVEMENTS.

' APPLICATION FILED SEPT. 21, 1903.

N0 MODEL.

Qf oiwesaes.

UNITED STATES Patented March 15, 1904.

PATENT OEEICE.

OLOF OHLSON, OF WALTHAM, MASSACHUSETTS, ASSIGNOR TO AMERICAN VVALTHAMWVATCH. COMPANY, OF IVALTHAH, MASSACHUSETTS, A COR- PORATION OFMASSACHUSETTS.

ORNAMENTATION F EXPOSED WINDING-WHEELS 0F WATCH-MOVEMENTS.

SPECIFICATION forming part of Letters Patent No. 754,600, dated March15, 1904.

Application filed September 21, 1903. Serial No- 173,940. (No model.)

To all whom, 717 may concern:

Be it known that I, OLOF OHLSON, of Valtham, in the county of Middlesexand State of Massachusetts, have invented certain new and usefulImprovements in Ornamentation of Exposed VVinding-IVheels ofVVatch-Movements, of which the following is a specification.

This invention relates to an improved means for obtaining a brilliantlight-reflecting sur- O face in watch-movements, particularly on theexposed winding-wheels thereof. In order to effect this result, atpresent it is common to ream out the centers of the winding-wheels,either the Wheel itself or the broad pillar in I 5 the center thereof,and then to polish the reamed portion, so as to form a brilliantscintillating concaved surface. The polishing of a concaved surface is asomewhat expensive operation; and it is the object of the presentinvention to reduce the expense and also to attain other advantages, aswill appear.

Of the accompanying drawings, Figure 1 represents a plan view of awatch-movement plate,showing the winding-wheels ornamented 2 5 accordingto this invention. Fig. 2 represents a section of the winding-wheel onthe spring barrel-arbor. Fig. 3 represents a similar section of thecrown-wheel enlarged. Fig. 4 rep resents a plan view of a modified formof or- 3 namentation. Fig. 5 represents a section on line 5 5 of Fig. 4.

The same reference characters indicate the same parts in all thefigures.

In the drawings, 10 is the crown-wheel. and 11 the barrel-arbor wheel,of the windingmovement. In Fig. 2 it will be seen that the winding-wheel11 is dished or concaved at 12 on its upper surface to form a dishedbed, this being effected by an ordinary reaming operation. To this bedis fitted or conformed a flexible sheet-metal plate or disk of suitablematerial, such as steel, which will take a high polish. The uppersurface of the plate is less expensive operation than the polishing of Ua concave surface. The plate is dished or concaved by screwing home intothe spring barrelarbor 14 a screw 15, whereby wheel 11 is secured tosaid arbor, the head of said screw abutting the edges of the centralopening of the plate. The screw maintains the concavity of the plate,and the latter being somewhat springy also acts a friction device, whichprevents the screw from working loose.

In Fig. 2 the plate 13 rotates with the winding-wheel; but this is notessential, as the plate may be applied to a stationary pillar, as thebroad pillar 16 of the crown-wheel 10, as shown in Fig. 3, the platebeing concaved by a screw 17 which holds the pillar 16 to themovement-plate 18.

In Figs. 4 and 5 the plate 13 is provided in its under side with aseries of radial grooves 19, one of which is indicated in section inFig. 5, said grooves forming weakened lines of di vision, so that whenthe plate is dished or concaved by depressing its center it forms itselfinto a series of substantially flat sectoral panels 19 19, thesebrilliarit-surfaced panels increasing the scintillating effect.

I claim-- 1. An ornamental construction for an exposed part of awatch-movementor the like, comprising a continuous dished bed, aflexible plate separable or distinct from the said bed and having anunbroken surface, and means for conforming the plate to the bed.

2. An ornamental construction for the center of an exposedwinding-wheel, comprising a wheel having a vertical dished bed, aflexible plate covering said bed, and a screw securing and conformingthe plate to the bed.

3. An ornamentation comprising a continuous or unbroken,normally flat,flexible plate having a brilliant surface, and means for springing saidplate to impart a dished form thereto.

4. An ornamentation comprising abrilliant- In testimony whereof I haveaifixed my sigsurfaced, sheet -metal plate, and means for nature inpresence of two Witnesses. springing said plate to impart a dished formHL 1 thereto, the plate having radial grooves in its OLOT O 5 underside, producing weakened lines of di- -W1tnesses:

vision, whereby substantially flat surfaced BEATRICE E. MEsrrER,

sectoral panels are formed on the dished plate. E. A. 1VIARsI-I.

